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