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