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