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