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