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