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