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)(12,18)(13,19)(14,23)(15,17)(16,21)(22,24) involution — undirected(9,11,15,12)(10,16,17,24)(13,21,14,22)(18,23,20,19)(2,5)(6,8)(10,17)(13,14)(18,20)(21,22) involution — undirected(9,12,15,11)(10,18,17,20)(13,22,14,21)(16,19,24,23)(1,3,4,7)(2,6,5,8)(9,13,15,14)(10,19,17,23)(11,21,12,22)(16,18,24,20)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.