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