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