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