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