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