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