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