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