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