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