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