One vertex per element, one color per generator, with an edge from x to x·s.
(6,9)(10,12)(13,14,16,17)(15,18,19,20)(21,22,27,32)(23,30,24,35)(25,29,34,36)(26,33,28,31)(1,2,3,4)(5,6,8,9)(7,10,11,12)(21,23,28,34,27,24,26,25)(22,29,33,35,32,36,31,30)(2,4)(7,11)(10,12)(14,17)(18,20)(21,24,27,23)(22,30,32,35)(25,28,34,26)(29,33,36,31)(5,7,8,11)(6,10,9,12)(13,15,16,19)(14,18,17,20)(21,25,26,24,27,34,28,23)(22,30,31,36,32,35,33,29)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.