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