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