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)(19,21,25,23)(20,24,30,28)(27,31,32,29)(33,34,40,44)(35,41,46,48)(36,42,37,39)(38,43,45,47)(1,3)(2,7)(4,10)(5,9)(6,11)(8,13)(12,14)(15,16)(17,19,22,25)(18,23,26,21)(20,27,30,32)(24,29,28,31)(33,35,40,46)(34,41,44,48)(36,47,37,43)(38,39,45,42)(2,8)(3,11)(9,16)(10,12)(33,36,40,37)(34,42,44,39)(35,43,46,47)(38,41,45,48)(1,3)(2,7)(4,10)(5,9)(6,11)(8,13)(12,14)(15,16)(17,18)(19,23)(20,28)(21,25)(22,26)(24,30)(27,31)(29,32)(33,37,40,36)(34,39,44,42)(35,43,46,47)(38,41,45,48)(1,4,6,14)(2,9,8,16)(3,12,11,10)(5,7,15,13)(17,20)(18,24)(19,27)(21,31)(22,30)(23,29)(25,32)(26,28)(33,38)(34,43)(35,39)(36,41)(37,48)(40,45)(42,46)(44,47)(1,5,6,15)(2,10,8,12)(3,9,11,16)(4,13,14,7)(17,21,22,23)(18,25,26,19)(20,29,30,31)(24,27,28,32)(33,39)(34,36)(35,45)(37,44)(38,46)(40,42)(41,47)(43,48)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.