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