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