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