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