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