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