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