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