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