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)(15,26)(16,21)(17,28)(18,25)(19,24)(20,23)(22,27)(2,4)(5,7,9,8)(6,10,12,11)(13,15,19,16)(14,21,24,26)(17,20,27,18)(22,23,28,25)(13,16,20,27,19,15,18,17)(14,22,25,21,24,28,23,26)(1,2,3,4)(13,17,20,16,19,27,18,15)(14,21,25,28,24,26,23,22)(5,8,9,7)(6,11,12,10)(13,18,19,20)(14,23,24,25)(15,17,16,27)(21,28,26,22)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.