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