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