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