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