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