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