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