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