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