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