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