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