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