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