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