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