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