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