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