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