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