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