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