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