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