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