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