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