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