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