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