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