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