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