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