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