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