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