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