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