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