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