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