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