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