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