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