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