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