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