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