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