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