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