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