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