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