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