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