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