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