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