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