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