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