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)(27,33)(28,32)(29,38)(30,34)(31,37)(35,39)(36,40)(9,11,15,16)(10,13,12,18)(14,22,23,19)(17,24,20,21)(25,27,30,37)(26,31,34,33)(28,35,38,40)(29,39,32,36)(1,2)(3,6)(4,5)(7,8)(9,10,15,12)(11,18,16,13)(14,17,23,20)(19,24,22,21)(25,28,30,38)(26,32,34,29)(27,35,37,40)(31,36,33,39)(3,7)(6,8)(9,12,15,10)(11,13,16,18)(14,20,23,17)(19,21,22,24)(25,29)(26,28)(27,36)(30,32)(31,40)(33,35)(34,38)(37,39)(1,3,4,7)(2,6,5,8)(9,13)(10,16)(11,12)(14,21)(15,18)(17,22)(19,20)(23,24)(25,28)(26,32)(27,35)(29,34)(30,38)(31,36)(33,39)(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)(25,27)(26,33)(28,35)(29,36)(30,37)(31,34)(32,39)(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.