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