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