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)(17,18,21,25)(19,23,28,31)(20,22,29,24)(26,32,27,30)(10,14)(13,16)(18,22)(19,26)(20,29)(23,31)(24,25)(27,28) involution — undirected(1,3,4,7)(2,6,5,8)(17,19,21,28)(18,23,25,31)(20,27,29,26)(22,30,24,32)(18,22)(19,27)(20,29)(24,25)(26,28)(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.