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