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