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