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