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