Based on the picture, it looks like the bare shaft is impacting nock level and to the left about a foot to the left of your fletched arrows. So here are some things you can do:
If you have a press and are happy with your rest position and want to try yoke tuning:
1) Put bow in press and add 1 full twist to the right yoke and take out 1 one full twist to the left yoke. That should keep you vertical nock travel the same but shift your bare shaft right towards your fletched arrows.
2) Repeat shooting a 3 arrow group and 1 bare shaft as before, but use a target that is chest high so that your fletched arrows hit nock level.
3) If the bare shaft is still hitting a little left of fletched, try repeating step one with only a half twist.
4) Repeat steps 1 and 2 till your bare shaft groups with your fletched arrows.
If you want to move your rest and yoke tune:
1) Move your rest right 1/32.
2) Add 1/2 twist to right yoke and remove 1/2 twist from left yoke.
3) Shoot bare shafts and fletched arrows at chest high target.
4) Repeat steps 2 and 3 as necessary.
Using rest only:
Move rest 1/16 to the right.
If you find that your bare shaft hits high and to the left of your fletched arrows with nock low, add 1/2 to 1 twist to right yoke only. If you find your arrows hits high, to right of fletched arrows with nock low, add 1/2 to 1 twist to left yoke only. If you find that your bare shaft is a few inches high of your fletched arrows with nock low, add 1/2 to 1 twist to the buss cable (cable with the Y) OR add 1/2 to 1 twist to each yoke OR take out 1/2 to 1 twist from control cable (Adding equal twists to each yoke is best for fine tuning).
If you find that your bare shaft directly below your fletched arrows for any reason, you need to either take twists out of the yokes or buss cable OR add twists to the control cable. I prefer taking twists out of the control cable if there are enough twists to take out. If not, then take them out of the bottom of the buss cable or yokes depending on which side has the most available twists.
I should add that I always set my center shot at 13/16 from the bare riser. My nock is set level and the arrow running through the berger holes. I yoke tune from there until I get perfect bare shaft flight. When done, my broadheads hit with my field points and bare shafts.