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