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