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