One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,5)(3,7,8,6)(9,10,15,11)(12,14,16,13)(17,18,21,24)(19,26,27,23)(20,22,25,31)(28,30,29,32)(2,5)(6,7)(9,11,15,10)(12,13,16,14)(17,19,21,27)(18,23,24,26)(20,30,25,32)(22,28,31,29)(9,12,14,11,15,16,13,10)(17,20,22,24,21,25,31,18)(19,23,28,30,27,26,29,32)(1,3,4,8)(2,6,5,7)(9,13,15,14)(10,12,11,16)(18,24)(20,25)(23,26)(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.