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