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