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