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