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