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