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