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