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