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