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