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