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