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