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