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