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