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