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