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