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