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