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