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)(16,21)(17,25)(18,22)(19,23)(24,26)(27,28)(5,6)(7,10)(8,12)(9,11)(13,15,19,25)(14,17,23,20)(16,21,27,28)(18,22,24,26)(1,2,3,4)(13,16)(14,21)(15,24)(17,22)(18,25)(19,27)(20,26)(23,28)(5,7,9,8)(6,10,11,12)(13,17,19,20)(14,15,23,25)(16,26,27,22)(18,28,24,21)(5,8,9,7)(6,10,11,12)(13,18,19,24)(14,22,23,26)(15,16,25,27)(17,28,20,21)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.