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