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