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