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