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