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