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