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