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