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