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