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)(14,17)(15,19)(22,24)(23,27)(5,6)(7,11)(8,9)(10,12)(13,14,16,17)(15,18,19,20)(6,9)(10,11)(13,15,16,19)(14,18,17,20)(21,22,25,24)(23,26,27,28)(1,2,3,4)(5,6)(7,10)(8,9)(11,12)(13,15)(14,18)(16,19)(17,20)(21,23)(22,26)(24,28)(25,27)(5,7,8,12)(6,10,9,11)(13,14)(15,18)(16,17)(19,20)(21,24,25,22)(23,28,27,26)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.