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