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