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