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