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