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