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