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