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