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