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