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