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