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