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