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