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