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