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