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