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