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