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