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