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