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