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