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