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