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)(11,13)(12,14)(15,16)(17,18)(19,23)(20,31)(21,25)(22,27)(24,28)(26,30)(29,38)(32,40)(33,44)(34,37)(35,41)(36,42)(39,43)(45,48)(46,47)(1,3)(2,6)(4,7)(5,8)(9,10)(11,15)(12,14)(13,16)(17,19,22,30)(18,23,27,26)(20,32,34,28)(21,29,36,35)(24,31,40,37)(25,38,42,41)(33,45,46,43)(39,44,48,47)(1,4,5,2)(3,7,8,6)(9,11)(10,13)(12,16)(14,15)(17,20,30,32,22,34,19,28)(18,24,23,37,27,40,26,31)(21,33,35,45,36,46,29,43)(25,39,38,47,42,48,41,44)(3,8)(6,7)(11,16)(13,15)(17,21,22,36)(18,25,27,42)(19,29,30,35)(20,33,34,46)(23,38,26,41)(24,39,40,48)(28,43,32,45)(31,44,37,47)(10,14)(13,15)(17,19,22,30)(18,26,27,23)(20,32,34,28)(21,35,36,29)(24,37,40,31)(25,38,42,41)(33,43,46,45)(39,44,48,47)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.