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)(33,34,40,43)(35,44,39,41)(36,38,37,42)(45,47,46,48)(2,8)(5,11)(9,14)(12,15)(17,18)(19,23)(20,29)(21,25)(22,27)(24,28)(26,30)(31,32)(33,35,40,39)(34,41,43,44)(36,46,37,45)(38,47,42,48)(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)(33,36,40,37)(34,42,43,38)(35,45,39,46)(41,47,44,48)(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)(33,37,40,36)(34,38,43,42)(35,46,39,45)(41,48,44,47)(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)(33,38)(34,36)(35,47)(37,43)(39,48)(40,42)(41,46)(44,45)(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)(33,39,40,35)(34,41,43,44)(36,46,37,45)(38,48,42,47)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.