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