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