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