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