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