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