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