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