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