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