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