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