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