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