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)(15,17)(16,24)(18,21)(19,22)(20,26)(23,25)(27,28)(5,7,10,8)(6,11,9,12)(13,15,17,14,19,21,18,22)(16,24,26,28,25,23,27,20)(2,4)(5,6,10,9)(7,12,8,11)(13,16,17,26,19,25,18,27)(14,20,21,24,22,28,15,23)(5,8,10,7)(6,11,9,12)(16,25)(20,28)(23,24)(26,27)(5,9,10,6)(7,12,8,11)(13,17,19,18)(14,15,22,21)(16,26,25,27)(20,23,28,24)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.