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