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