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