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