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