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