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