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