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