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