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