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