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