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