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