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