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