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