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