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