One vertex per element, one color per generator, with an edge from x to x·s.
(2,7)(4,5)(8,15)(9,14)(10,16)(11,12)(17,18,23,28)(19,29,33,40)(20,25,22,27)(21,26,36,44)(24,30,39,32)(31,45,47,42)(34,41,37,43)(35,48,46,38)(1,2,6,9)(3,10,13,15)(4,14,5,7)(8,11,16,12)(17,19,23,33)(18,24,28,39)(20,32,22,30)(21,35,36,46)(25,40,27,29)(26,42,44,45)(31,37,47,34)(38,41,48,43)(1,2)(3,8)(4,7)(5,14)(6,9)(10,12)(11,15)(13,16)(17,20,23,22)(18,25,28,27)(19,30,33,32)(21,34,36,37)(24,29,39,40)(26,41,44,43)(31,35,47,46)(38,45,48,42)(1,3,6,13)(2,8,9,16)(4,11,5,12)(7,15,14,10)(17,21)(18,26)(19,31)(20,34)(22,37)(23,36)(24,38)(25,41)(27,43)(28,44)(29,45)(30,35)(32,46)(33,47)(39,48)(40,42)(1,4,6,5)(2,7,9,14)(3,11,13,12)(8,15,16,10)(17,20,23,22)(18,27,28,25)(19,32,33,30)(21,34,36,37)(24,29,39,40)(26,43,44,41)(31,46,47,35)(38,45,48,42)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.