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