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