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)(15,21)(16,26)(17,22)(18,27)(19,23)(20,24)(25,28)(2,4)(5,7,9,8)(6,10,12,11)(13,14)(15,21)(16,26)(17,22)(18,27)(19,23)(20,24)(25,28)(13,15,18,24,19,25,17,16)(14,20,22,21,23,26,27,28)(1,2,3,4)(13,16,17,25,19,24,18,15)(14,21,27,20,23,28,22,26)(5,8,9,7)(6,11,12,10)(13,17,19,18)(14,22,23,27)(15,16,25,24)(20,21,26,28)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.