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