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