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