One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10,14,15,13,11,12,16)(17,18,22,27,23,28,21,26)(19,24,29,25,20,30,31,32)(1,3,4,8)(2,5,6,7)(10,11)(15,16)(17,19,22,29,23,20,21,31)(18,24,27,25,28,30,26,32)(9,11,13,10)(12,16,14,15)(17,20)(18,25)(19,23)(21,31)(22,29)(24,27)(26,30)(28,32)(2,6)(5,7)(9,12,13,14)(10,15,11,16)(17,21,23,22)(18,26,28,27)(19,29,20,31)(24,25,30,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.