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