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