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