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