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