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