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