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