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