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