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)(16,27)(17,20)(18,23)(19,22)(21,26)(25,28)(2,4)(5,7,9,8)(6,10,12,11)(13,15,19,26)(14,21,22,24)(16,18,25,20)(17,28,23,27)(13,16,18,26,19,25,20,15)(14,21,17,27,22,24,23,28)(1,2,3,4)(13,17,20,14,19,23,18,22)(15,21,25,28,26,24,16,27)(5,8,9,7)(6,11,12,10)(13,18,19,20)(14,17,22,23)(15,25,26,16)(21,28,24,27)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.