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