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)(18,21)(22,24) involution — undirected(2,5)(6,8)(9,11)(10,13)(12,15)(14,16)(18,22)(19,23)(21,24) involution — undirected(1,3,4,7)(2,6,5,8)(10,14)(11,15)(18,21)(22,24)(10,14)(13,16)(17,18,19,22,20,21,23,24)(2,5)(6,8)(18,21)(22,24) 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.