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