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