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