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