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