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