As you leave the blue blazed trail you should come out between cabins #1 and #2. Continue in a straight line watching for a large rock engraved with the word "CUSTODIAN" which you will come to within a 100 yards or less. At "CUSTODIAN" take a right onto the road, and simple follow the road to the top.
This image is attached to the Trail: Cheaha Lake to Summit route page.