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