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