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