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