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