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