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