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