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