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