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