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