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