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