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