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