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