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