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