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