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