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