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