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