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