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