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