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