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