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