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