In a skillet, heat the olive oil over medium heat. Add the shredded chicken and season with chili powder, cumin, garlic powder, onion powder, paprika, salt, and pepper. Stir to combine and cook for about 5 minutes, until heated through.
While the chicken is cooking, warm the corn tortillas in a separate skillet over medium heat for about 30 seconds on each side until pliable.
To assemble the tacos, place a portion of the seasoned chicken on each tortilla. Top with diced tomatoes, shredded lettuce, queso fresco, and chopped cilantro.
Serve immediately with lime wedges on the side for squeezing over the tacos.