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