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