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