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)(22,27)(24,25)(28,30)(29,35)(31,36)(32,34) involution — undirected(5,7)(6,10)(8,14)(9,13)(11,17)(12,18)(15,20)(16,19)(21,22,25,27,26,28,24,30)(23,31,32,36,33,29,34,35)(1,2,3,4)(6,11)(7,13)(12,15)(14,19)(22,28)(27,30)(29,31)(35,36)(7,13)(10,17)(14,19)(18,20)(21,23)(22,29)(24,34)(25,32)(26,33)(27,35)(28,31)(30,36) involution — undirected(5,8,9,16)(6,12,11,15)(7,14,13,19)(10,18,17,20)(21,24,26,25)(22,30,28,27)(23,32,33,34)(29,35,31,36)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.