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)(11,15)(12,14)(13,16) involution — undirected(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(17,18)(19,22)(20,27)(21,26)(23,28)(24,31)(25,30)(29,32) involution — undirected(10,14)(11,16)(17,19,22,18)(20,25,29,23)(21,26,31,24)(27,28,32,30)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,20,22,29)(18,23,19,25)(21,30,31,28)(24,32,26,27)(2,5)(6,8)(10,14)(13,15)(18,19)(23,25)(24,26)(27,32) 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.