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