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)(13,14,19,20,18,22,16,26)(15,23,24,27,25,17,21,28)(5,7,10,6)(8,11,9,12)(13,15,18,25)(14,17,22,23)(16,21,19,24)(20,28,26,27)(1,2,3,4)(13,16,18,19)(14,20,22,26)(15,24,25,21)(17,27,23,28)(5,8,10,9)(6,11,7,12)(13,16,18,19)(14,20,22,26)(15,24,25,21)(17,27,23,28)(5,9,10,8)(6,11,7,12)(13,17,16,27,18,23,19,28)(14,21,26,25,22,24,20,15)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.