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