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