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