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