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