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