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