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