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