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