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