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