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