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