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