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