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