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