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