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