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