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