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