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