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