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