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