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