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