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