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