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