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