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