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