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