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