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