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