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