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