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