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