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