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