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