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