One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(6,8)(9,10,15,17)(11,16,12,14)(13,18,22,24)(19,23,20,21)(26,31)(28,32)(33,39)(36,40)(1,2)(3,6)(4,5)(7,8)(9,11,15,12)(10,16,17,14)(13,19,22,20)(18,23,24,21)(25,26)(27,28)(29,33)(30,31)(32,35)(34,36)(37,40)(38,39)(10,17)(14,16)(18,24)(21,23)(26,31)(28,32)(33,39)(36,40) involution — undirected(9,12,15,11)(10,14,17,16)(13,19,22,20)(18,23,24,21)(25,27,30,35)(26,32,31,28)(29,37,38,34)(33,36,39,40)(1,3,4,7)(2,6,5,8)(9,13)(10,18)(11,19)(12,20)(14,21)(15,22)(16,23)(17,24)(25,28,30,32)(26,27,31,35)(29,36,38,40)(33,34,39,37)(9,14)(10,11)(12,17)(13,21)(15,16)(18,19)(20,24)(22,23)(25,29)(26,33)(27,34)(28,36)(30,38)(31,39)(32,40)(35,37) 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.