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