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