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