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)(15,22)(16,17)(18,26)(19,21)(20,24)(23,28)(25,27)(6,9)(7,11)(13,15,16,23,19,25,18,24)(14,20,26,27,21,28,17,22)(2,4)(5,6)(7,10)(8,9)(11,12)(13,16,19,18)(14,17,21,26)(15,23,25,24)(20,22,28,27)(6,9)(10,12)(13,17,19,26)(14,16,21,18)(15,20,25,28)(22,24,27,23)(5,7,8,11)(6,10,9,12)(13,16,19,18)(14,17,21,26)(15,24,25,23)(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.