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