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