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