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