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