One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(5,6)(7,9)(8,10)(11,12) involution — undirected(1,2,4,3)(5,7)(6,9)(8,11)(10,12)(13,14,18,21)(15,19,23,27)(16,25,20,17)(22,24,26,28)(6,10)(7,11)(13,15,18,23)(14,19,21,27)(16,26,20,22)(17,24,25,28)(6,10)(9,12)(13,16,17,14,18,20,25,21)(15,22,24,27,23,26,28,19)(1,3,4,2)(15,23)(19,27)(22,26)(24,28)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.