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