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