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