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