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