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