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