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