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