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)(17,18,22,23)(19,21,25,31)(20,24,29,32)(26,30,27,28)(33,34,40,42)(35,43,39,41)(36,38,37,47)(44,48,45,46)(2,7)(4,8)(10,13)(12,14)(17,19)(18,21)(20,27)(22,25)(23,31)(24,28)(26,29)(30,32)(33,35,40,39)(34,41,42,43)(36,44,37,45)(38,46,47,48)(2,7)(3,9)(10,13)(11,16)(18,23)(19,25)(24,32)(26,27)(33,36,40,37)(34,38,42,47)(35,44,39,45)(41,46,43,48)(1,3)(2,8)(4,7)(5,11)(6,9)(10,14)(12,13)(15,16)(17,19)(18,21)(20,27)(22,25)(23,31)(24,28)(26,29)(30,32)(33,37,40,36)(34,38,42,47)(35,45,39,44)(41,46,43,48)(1,4,6,8)(2,9,7,3)(5,14,15,12)(10,11,13,16)(17,20,22,29)(18,24,23,32)(19,26,25,27)(21,30,31,28)(33,38)(34,37)(35,46)(36,42)(39,48)(40,47)(41,45)(43,44)(1,5,6,15)(2,10,7,13)(3,11,9,16)(4,12,8,14)(17,21)(18,19)(20,28)(22,31)(23,25)(24,27)(26,32)(29,30)(33,39,40,35)(34,41,42,43)(36,45,37,44)(38,46,47,48)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.