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