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