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