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)(13,14,19,21,18,22,17,28)(15,23,24,27,26,20,25,16)(5,7,10,6)(8,11,9,12)(13,15,17,25,18,26,19,24)(14,20,28,27,22,23,21,16)(1,2,3,4)(13,16)(14,15)(17,20)(18,27)(19,23)(21,24)(22,26)(25,28)(5,8,10,9)(6,11,7,12)(13,17,18,19)(14,21,22,28)(15,24,26,25)(16,20,27,23)(5,9,10,8)(6,11,7,12)(13,17,18,19)(14,21,22,28)(15,25,26,24)(16,23,27,20)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.