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