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