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)(11,18)(12,22)(13,16)(14,23)(15,17)(19,24)(20,21)(25,26,31,34)(27,32,38,40)(28,33,36,37)(29,39,35,30)(2,3)(6,7)(9,11,15,13)(10,16,17,18)(12,20,23,19)(14,21,22,24)(25,27)(26,32)(28,29)(30,37)(31,38)(33,39)(34,40)(35,36)(9,12)(10,14)(11,19)(13,20)(15,23)(16,24)(17,22)(18,21)(25,28)(26,33)(27,35)(29,38)(30,32)(31,36)(34,37)(39,40) involution — undirected(2,3)(4,8)(9,12)(10,14)(11,20)(13,19)(15,23)(16,21)(17,22)(18,24)(25,28)(26,33)(27,29)(30,40)(31,36)(32,39)(34,37)(35,38) involution — undirected(1,3,5,2)(4,7,8,6)(9,13,15,11)(10,16,17,18)(12,20,23,19)(14,24,22,21)(25,29)(26,30)(27,36)(28,38)(31,35)(32,33)(34,39)(37,40)(1,4)(2,6)(3,7)(5,8)(9,14)(10,12)(11,21)(13,24)(15,22)(16,20)(17,23)(18,19)(25,30)(26,29)(27,37)(28,32)(31,39)(33,38)(34,35)(36,40) 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.