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