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