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