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