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