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