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