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)(17,18,21,20)(19,25,28,23)(22,24,31,30)(26,27,29,32)(2,5)(6,8)(9,11,13,12)(10,14,16,15)(17,19)(18,23)(20,25)(21,28)(22,26)(24,32)(27,30)(29,31)(9,11,13,12)(10,15,16,14)(19,26)(22,31)(23,32)(24,30)(25,27)(28,29)(9,12,13,11)(10,15,16,14)(17,20,21,18)(19,27,28,32)(22,24,31,30)(23,26,25,29)(1,3,4,7)(2,6,5,8)(18,20)(23,25)(24,30)(27,32)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.