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