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