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)(14,18)(16,23)(19,24)(20,25)(22,27)(26,28)(5,7,11,9)(6,12,10,8)(13,14,16,18,17,19,23,24)(15,20,22,25,21,26,27,28)(1,2,3,4)(5,8,11,12)(6,7,10,9)(14,19)(15,21)(18,24)(22,27)(5,9,11,7)(6,12,10,8)(13,15,17,21)(14,20,19,26)(16,22,23,27)(18,25,24,28)(5,10,11,6)(7,8,9,12)(15,21)(20,26)(22,27)(25,28)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.