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