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