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