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