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