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