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