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)(13,14)(15,19)(16,18)(17,20)(21,22,25,27)(23,26,24,28)(1,3,4,2)(5,7,9,8)(6,10,12,11)(13,15,17,16)(14,18,20,19)(21,23,27,28,25,24,22,26)(5,7,9,8)(6,11,12,10)(13,16,17,15)(14,19,20,18)(21,24,25,23)(22,26,27,28)(5,8,9,7)(6,11,12,10)(14,20)(18,19)(21,22,25,27)(23,28,24,26)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.