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