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