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