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