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