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