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