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