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