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