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