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