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