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