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