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