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