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