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