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