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