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