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