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