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