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)(15,19)(16,18)(17,20)(21,22)(23,31)(24,28)(25,30)(26,29)(27,34)(32,36)(33,35)(1,3,4,2)(5,7,9,8)(6,10,12,11)(13,15,17,16)(14,18,20,19)(21,23)(22,27)(24,33)(25,34)(26,32)(28,36)(29,35)(30,31)(5,7,9,8)(6,11,12,10)(13,16,17,15)(14,19,20,18)(22,28)(23,32)(24,26)(27,31)(29,30)(33,34)(5,8,9,7)(6,11,12,10)(14,20)(18,19)(21,24,25,26)(22,29,30,28)(23,33,34,32)(27,35,31,36)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.