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