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