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)(27,32)(28,31)(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)(32,36)(2,4)(5,8,9,7)(6,10,11,12)(15,19)(17,20)(22,26)(27,34)(28,33)(29,35)(21,23,31,36,24,30,25,32)(22,27,33,35,26,34,28,29)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.