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