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)(11,12)(17,18)(19,28)(20,21)(22,31)(23,27)(24,30)(25,29)(26,32) involution — undirected(1,2,5,3)(4,6,8,7)(9,10,14,13)(11,16,12,15)(17,19,23,30)(18,24,27,28)(20,26,25,31)(21,22,29,32)(1,2,5,3)(4,6,8,7)(9,11,14,12)(10,15,13,16)(17,20,23,25)(18,21,27,29)(19,26,30,31)(22,28,32,24)(2,3)(6,7)(9,12,14,11)(10,16,13,15)(17,21,23,29)(18,25,27,20)(19,22,30,32)(24,31,28,26)(1,3,5,2)(4,7,8,6)(9,13,14,10)(11,16,12,15)(17,18)(19,24)(20,21)(22,26)(23,27)(25,29)(28,30)(31,32)(1,4)(2,6)(3,7)(5,8)(17,22)(18,26)(19,29)(20,28)(21,30)(23,32)(24,25)(27,31) 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.