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