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