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