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