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