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