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