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