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